The nominate race of this
species lives on the island of Réunion, where it is now threatened with
extinction.

The endemic subspecies from the neighbouring island of Mauritius died out,
depending on source at 1929 or 1957, after the only larval host plant,
the Wood Nettle (Obetia ficifolia), disappeared from the island.

left:

Mauritian Mother-of-Pearl Butterfly (Salamis augustina vinsoni)

Depiction from 'Transactions of the Entomological Society of London.
London, The Society. 1907'